IndyCar driver Justin Wilson dies of head injury

INDIANAPOLIS, IN -- IndyCar driver Justin Wilson has died of a head injury.

The 37-year-old father of two was struck by a large piece of debris from another driver's car following a single-car accident Sunday at Pocono Raceway.

A heavy piece of the nose from Sage Karam's car appeared to strike the British driver in the head before the debris ricocheted high into the air. Wilson did not appear to have control of his car as it veered left and directly into an interior wall.

The series heads to Sonoma, California, on Wednesday to begin preparing for the finale, in which six drivers remain eligible to win the title Sunday.

IndyCar has had its share of safety issues since the season opener at St. Petersburg, Florida, where debris from a car sailed over the grandstands and struck a fan in the concession area. The woman hit said in a lawsuit filed against IndyCar her skull was fractured. She contends she fell backward and hit her head after she was struck by debris.

IndyCar made a series of rule changes to fortify the many parts and pieces on its new aerodynamic body kits, but the nose that flew off of Karam's car is not a tethered part. The series was also forced into action during the buildup to the Indianapolis 500 after three cars went airborne during practices.